21515452103045 has 8 divisors (see below), whose sum is σ = 25892947547424. Its totient is φ = 17162758333264.

The previous prime is 21515452102981. The next prime is 21515452103059. The reversal of 21515452103045 is 54030125451512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21515452103045 - 2⁶ = 21515452102981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6200416739 + ... + 6200420208.

It is an arithmetic number, because the mean of its divisors is an integer number (3236618443428).

Almost surely, 2^{21515452103045} is an apocalyptic number.

It is an amenable number.

21515452103045 is a deficient number, since it is larger than the sum of its proper divisors (4377495444379).

21515452103045 is a wasteful number, since it uses less digits than its factorization.

21515452103045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12400837299.

The product of its (nonzero) digits is 120000, while the sum is 38.

Adding to 21515452103045 its reverse (54030125451512), we get a palindrome (75545577554557).

The spelling of 21515452103045 in words is "twenty-one trillion, five hundred fifteen billion, four hundred fifty-two million, one hundred three thousand, forty-five".